Rare B meson decays - mathieu trocmé

Abstract 1
ABSTRACT
This report aims to describe a way to measure simultaneously the branching ratio of the
0 * + −
meson decay B → K π and its conjugate . This way, based on the analysis of 61.6 ±
0.68 millions 0
0
0
0
B and B mesons, uses a cut and count method. The B / B mesons were
generated at SLAC between 1999 and 2002 in the PEP-II collider and detected by the BABAR
* +
* −
0 +
0
−
detector. The K / K were observed via their decay to a K π / K Sπ
, which results in a
0
0
B / B having the three body charmless final state
→ π
0
B
* +
K
−
&
0 +
K Sπ
The total branching ratio was found to be:
BR
S
0 + −
0
− +
K Sπ
π / K Sπ
π :
B
0
* −
+
→ K π
0
S
−
K π
0 * + −
0 * −
+
−6
{ B → K π } + BR{
B → K π } = ( 18.
6 ± 6.
5 ± 1.
6)
× 10
with a statistical significance of 3.2 σ